HELP ASAP!!!!! EMERGENCY PLEASE

Question

11. The initial concentration of a reactant in a second order reaction is 0.95 M. The

      rate constant k is 0.0045 M^-1 s^-1. What will be the concentration after 3 minutes?

Answer 1

As this is a second order reaction rate = k[A]²

We can use the integrated rate law for second order reactions to find the answer.

1/[A] = kt + 1/[A₀]

1/[A] = (0.0045) x (3 x 60) + 1/(.95 M)

1/[A] = .81 + 1.05

1/[A] = 1.85

[A] = .538 M

Hope that helps!